取模取余

算术运算符的练习

随意给出一个整数，打印显示它的个位数，十位数，百位数的值。

class  Kjnj
{
    
    
	public static void main(String[] args) 
	{
    
    
		int a=351;
        int b = a/100;
		//int c = a%100;
        //int s = c/10;
	    int s = (a%100)/10;
        int g = a%10;
		System.out.println("g=" + g + ",s=" + s + ",b="+b);

	}
}

下面给出了一些优化

class  kjnj
{
    
    
	public static void main(String[] args) 
	{
    
    
		int a=67951;
        int b ;
		//int c = a%100;
        //int s = c/10;
	  //  int s = (a%100)/10;
      //  int g = a%10;
		while(a!=0)
		{
    
    
			b=a%10;
			a=a/10;
			System.out.println("b="+b);
		}
		//System.out.println("g=" + g + ",s=" + s + ",b="+b);

	}
}

package Test;

import java.util.Scanner;

public class Test1 {
    
    
    public static void main(String[] args) {
    
    
        Scanner sc = new Scanner(System.in);

        System.out.println("输入一个数：");
        int n = sc.nextInt();

        int bw = n / 100;
        int sw = n % 100 / 10;
        int gw = n % 10;

        System.out.println(bw+":"+sw+":"+gw);
    }
}